E.g.f. A(x) satisfies A(x) = 1/( 1 - x * cos(x * A(x)) )^2.

A381379

E.g.f. A(x) satisfies A(x) = 1/( 1 - x * cos(x * A(x)) )^2.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =18a(4) =-48a(5) =-2630a(6) =-52800a(7) =-824054a(8) =-8682240a(9) =54462258a(10) =7410631680a(11) =305163480578

External references